Quincy Bridge Company ended in 1866.
Quincy Railroad Bridge Company ended in 1903.
Quincy Bridge Company was created in 1866.
Quincy Memorial Bridge was created in 1928.
Railroad Bridge Company ended in 1866.
Sibley Bridge Company ended in 1900.
Keithsburg Bridge Company ended in 1901.
Pee Dee Bridge Company ended in 1915.
Michigan Central Bridge Company ended in 1898.
Mercer County Bridge Company ended in 1885.
Detroit River Bridge Company ended in 1905.
St. Louis Merchants Bridge Company ended in 1920.
Hudson River Bridge Company at Albany ended in 1976.